EVAP TF: Status report on EVAP by T. Fujiwara (WLTP-15-08e)
The EVAP procedure for WLTP is based on the new European EVAP procedure.
15 discussion points are still open. Examples:
Purge cycle: Class 1 and 2&3 shall have a similar distance. Fujiwara-san gives an overview on the current state of discussions.
Test result: Two option are possible: a) result of the worst day or b) the sum of all days –>According to the current draft C6 regulation, China uses the one day max value. India wants to have an option to use a one day max value. Japan and EU will use the total result of two days. Due to the different needs above, Evap. GTR shall have options to allow CPs to select either one day max value or two days total value.
US EPA submited written comments to the current WLTP procedure and expresses an interest to harmonise the US and WLTP procedure. Examples of their comments: Purging during urban driving, 2 vs. 3 day diurnals, permeation leaks, prescribed useful live, fuel spillage limits, ORVR, Exhaust emission limits and exhaust emission limits.
US amendments might be added in a phase 2 for EVAP, since the EVAP procedure shall be completed until end of phase 2a.
OICA notices the use of technology related legislation for tanks and will make a proposal for the use of single layer, multilayer tanks (plastic fuel tank) and the use of steel fuel tanks. The latter would be regarded as a single layer tank in the current draft.